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wholesale jewelry boxes new york There are three methods
1. Use the test goldstone to identify the color of the color and the test jewelry of the tested golden stone. By comparing the color, the gold jewelry is determined. This method should be carried out under natural light and sunlight, and cannot be carried out under the direct sunlight and incandescent lamps.
2. Use acid points to wear golden stones on the golden stones, respectively, and compare gold, respectively. Try nitric acid on the golden road with a glass stick. Because the chemical properties of the golden element are stable and do not respond to the acid, the color remains unchanged.
3. With fire burning, the jewelry will be burned red (do not melt the jewelry), and observe the color change after cooling. Is not pure gold. Generally, the lower the color, the stronger the color, and the darkens are all, indicating that it is a fake gold jewelry. After burning red, it is quenched into the water, and the color remains unchanged. It really does not change color when it comes to fire.
Because gold has high collection value in previous ages, there are imitation gold in various historical periods. How to identify Qianlong Gold's authenticity is more difficult. The identification of authenticity must be identified from many aspects such as the shape, texture, paste, text and production process of gold. The casting process of various historical periods is different, and it is impossible for the counterfeit to be completely grasped. The value of coins depends on the age of coins and the number of existences. Coins not only have economic value, but also historic and artistic value, and historical value and artistic value directly affect economic value.
The expansion information:
. The main purpose of gold
(1) For international reserves. This is determined by the attributes of gold currency commodities. Due to the excellent characteristics of gold, the function of gold as currency in history, such as value scale, circulation means, storage methods, payment methods, and world currencies. With the development of socio -economic development, gold has withdrawn from circulation.
(2) Use as jewelry decoration. Gorgeous gold jewelry has always been a symbol of a person's social status and wealth.
(3) Application in industry and science and technology. Due to the unique and perfect characteristics of gold, it is because of so many beneficial properties that it has reasons to widely use the most needed modern high -tech industries.
. The role of gold in the currency system can be traced back to the golden standard or complexity system widely adopted by various emerging capitalist countries in the 1618th century. There are two forms of complexity system. One is the "parallel standard system" of gold and silver coins according to its actual value circulation. One is the "dual -standard system" or "two -currency -level system" that is circulating in the statutory price of national statutory prices.